
#!/bin/bash

function s1_hello(){
echo'hello,world'
}

function s2_tell_who_i_an(){
whoami
}

function  s3_which_distro_do_i_use(){
echo -n'NAME='
cat /etc/redhat-release
}

function s4_view_my_cpu_arch(){
uname -m
}

function s5_show_first_scsi_disk_size(){
lsblk -l | \grep disk | \grep'^sda' | awk'{print $4}'
}

function s6_show_main_memory_size_in_megabytes(){
free -m | grep "Mem:"|awk '{print $2}'
} 


